When i sit crossed legged or lay on my side for too long i get a brief numbness/burning in outer thigh sort of like it has gone to sleep. is this ok?

Yeah.: It is a pinched nerve. BUT 1) the size of the area shows it is only a superficial one and cannot be a lumbar disk 2) the temporary nature of it shows it is not permanently damaged. but, I wouldnt let this go for an hour. Rarely these sort of things can cause nerve damage enough that it takes weeks/months to heal up (Newlywed arm syndrome).